Initially, there is 60 mg of a certain radioactive material present and after two hours, it is observed that the material has lost 10% of its original mass. Find the mass (in mg) of the material after 9 hours.

Q: A train has a length of 88.4 m and starts from rest with a constant acceleration at time t = 0 s. At…

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Q: At what height is a satellite in a geostationary orbit? What is gravitational acceleration there?…

A: When an object is located in the geostationary orbit, the orbital speed of the object will be equal…

Q: Jum The mass of the block depicted in the image is 2.94 kg. The spring has a spring constant of 77.2…

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Q: An airplane travels at 302 mi/h south for 4.00 h and then at 313 mi/h north for 702 miles. What is…

A: Given Data:- The airplane first travels at v1=302 mi/h for t1=4.00 h in South. Then the airplane…

Q: consider the following vectors below: 1. which of the following statements is false? a. A x (B+C) =…

A: Given value--- A = 2i + k. B = -5i - 7k. C = 9i -j + k. We have to find--- 1. which of the…

Q: The orbit of a spy satellite passes over both poles and it passes over the north pole every 90…

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Q: The 1200-kg car is being lowered slowly onto the dock using the hoist A and winch C. Determine the…

A: In the following problem, the car is being lowered slowly onto the dock using the hoist A and winch…

Q: Suppose a tank contains 636 m³ of neon (Ne) at an absolute pressure of 1.01x105 Pa. The temperature…

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Q: Two particles A and having accelerated through the same potential difference, enter a region of…

A: Magnetic field is uniform if its magnitude is equal and direction is same at every point in space.…

Q: What is the electric force from the rod on the point charge Q? Suppose that Q=16.9 nC and L= 4.27…

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Q: 1. When you take a sharp right turn while driving, you might find yourself pressed against the car…

A: Given  Question 1.... When you take a sharp right turn while driving, you might find yourself…

Q: A B Let's revisit a previous problem and add the force of friction. In the figure, block A has a…

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Q: A spider crawling across a table leaps onto a magazine blocking its path. The initial velocity of…

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Q: Suppose that an object travels from one point in space to another.  Comparing between the magnitude…

A: Given statement is false . To understand the given statement first we understand two terms distance…

Q: The velocity of a particle moving in the x-y plane is given by (7.481 +6.64j) m/s at time t = 6.53…

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Q: 2. Consider the following vector configurations. Draw where you think the balancing vector (i.e. the…

A: i Given the diagram of the vector is Considering the vertical line is the y-axis and the horizontal…

Q: Two 2.50-cm-diameter disks spaced 2.00 mm apart form a parallel-plate capacitor. The electric field…

A: givens: dia of disk=2.5cm=0.025 m separation between disks=2 mm=0.002m electric field=5*105   (i)the…

Q: A football is kicked at 25.0 m/s at an angle of 29.0° above the horizontal. Assume it starts 1.00 m…

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Q: calorie is a unit of heat or energy and it equals about 4.2 J where 1J= 1 kg m²s²². uppose we employ…

A: Given, A calorie is a unit of heat or energy and it equals about 4.2 J where 1 J = 1 kg m2 s-2. Now…

Q: Question 3: A platinum resistance thermometer is a device that allows us to determine the…

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Q: In each of the cases below, four charges are fixed in place as shown. The grid spacing is d and is…

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Q: As a sailboat sails 55 m due north, a breeze exerts a constant force F₁ on the boat's sails. This…

A: Given Data:- Magnitude of s1→=55 m Magnitude of s2→=44 m Magnitude of two forces are equal.…

Q: An electric field does 2.13 x 10³ eV of work on a helium nucleus of charge 3.20 x 10-19 C. Find the…

A: Given value--- An electric field does 2.13 x 103 eV of work on a helium nucleus of charge 3.20 x…

Q: 1. In the diagram below, a charged particle enters a region of uniform magnètic field where B = 0.6…

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Q: Which of the following persons can NOT be described as a body in equilibrium?? A late worker…

A: A simple mechanical body is in a state of  equilibrium if  linear acceleration or  angular…

Q: A small particle P starts from point O with a negligible speed and increases its speed to a value v…

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Q: A 50.0-g Super Ball traveling at 29.5 m/s bounces off a brick wall and rebounds at 16.0 m/s. A…

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Q: Titan has a radius of 2700.0 km and a mass of 1.4x1023kg. What is the escape velocity in km/s from…

A: Given value--- Titan has a radius of 2700.0 km. mass = 1.4x1023kg.  Titans exosphere, which begins…

Q: Given the forces shown below, the components of F1 are: X- F₁=75 lb 2 1 Y O Y O Fix=-67.1 lb F1Y =…

A: Given,

Q: Nuclear fusion - the energy source of the Sun, hydrogen bombs, and fusion reactors - occurs much…

A: Given    average kinetic energy of the atoms is  K.E.= 5.65 × 10-14 J

Q: Under the Equipartition Principle, in the high temperature limit, molecular heat capacity should be…

A: From the equipartition principle, it is known that: The average energy of each degree of freedom…

Q: In Neptune's rings, each ring particle collides with another particle on average around every 8.7…

A: Given data:   Average time taken in one collision = 8.7 hours Survival time of ring particles =…

Q: The position vector of a moving body is R(t) = 2ti- tj for t≥ 0. Express R and the velocity vector…

A: Given that, The position vector of a body is R→t=2ti^-t2j^ Then R=t4+t2 θ=tan-1-t22t So the radial…

Q: The energy reaching Earth from the Sun at the top of the atmosphere is 1.36x10^3 W/m2 , called the…

A: Using Stefan Boltzmann law, u = e σ T4 where  σ is Stefan’s constant = 5.67 × 10-8 W/m2 k4 for…

Q: When a voltage is applied to a conductor, the current that flows is limited by resistance.  Which of…

A: When a voltage is applied to a conductor, then due to potential difference created across the ends a…

Q: A refrigerator's freezer compartment is set at -10°C; the kitchen is 24°C. What is the theoretical…

A: Given:Temperature of teh kitchen is 24°C.Temperature of campartment is -10°C.Energy present in…

Q: What is the diameter and length of a cylinder?

A: In the Screw gauge Least count is LC=0.01mm Linear scale reading is L.S.R=12mm Circular scale…

Q: Base Focussing system aan POKET'S Connector Electron Pins Gun Vertical Deflection Plates Horizontal…

A: Uniform electric field: A uniform electric field is one in which the field strength remains constant…

Q: Thank

A: Given that  A ball with mass 0.15kg is thrown upward with initial velocity 20m/s afrom the roof of a…

Q: 1. A two-rotors tilt-rotor aircraft has a rotor diameter is 12m. If the actual power required (for…

A: Given, Rotor diameter, d = 12 m Rotor radius, r = 6 m Actual Power, P = 2.67 x 106 W Figure of…

Q: QUESTION 6 This is a continuation of the previous question. If the length of the pendulum is 0.75 m,…

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Q: Physics A particle moves in a straight line with the acceleration shown in the figure. Knowing that…

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Q: An object moves from 30.0 m/s to 120.0 m/s, accelerating at a constant rate of 6.0 m/s² How far did…

A: given -            initial velocity of object ( u )  = 30 m/s           final velocity of object ( v…

Q: Explain the reaction takes place in a perfectly sealed and insulated container, then the total…

A: Given, Reaction takes place in a perfectly sealed and insulated container.

Q: An object falls from the Transco Tower in Houston and takes 15 seconds to reach the ground. What is…

A: Given data:  A object falls from the tower Time taken to reach the ground = 15 s Required: The…

Q: particle’s position along the x-axis is described by x(t) = A t + B t², where t is in seconds, x is…

A: Velocity = dx/dt

Q: Using your fist, you press a box against a wall so that the force of static friction prevents it…

A: Given: The system is in static equilibrium. The free-body diagram is given below.

Q: Crickets Chirpy and Milada jump from the top of a vertical cliff. Chirpy just drops and reaches the…

A: Given data:  Initial horizontal velocity (v0x) = 95.0 cm/s Time taken to reach the ground (t) = 4.20…

Q: A block of mass moving at a speed of 10.0 m/s on a horizontal lab desk of height 1.0 m. Calculate…

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Q: Two moles of a dilute gas initially have a pressure equal to 100 [kPa], a volume equal to 0.02 [m³]…

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Half Life

The concept of Half Life has numerous practical applications some of them includes figuring out the effective drug dosage to finding out when a radioactive becomes safe to use. If you look for a career in Nuclear Physics you will need this concept.